摘要
研究了涪江合川江段的瓦氏黄颡鳃上的寄生甲壳动物———掘凿鳋的种群周年动态.该鳋的频率在宿主种群中呈负二项分布,其繁殖期为3月下旬至11月中旬,感染率和丰盛度表现出显著的周年变化,春末夏初变化最大.
The population of the copepod, Ergasilus scalaris Mark., 1940 parasitic on gills of the fish, Pelteobagrus vachelli, was investigated during one year cycle (12 months) in the Fujiang River of Hechuan County, China. Sample size was at least 15 in each month, and the total specimens collected were at 214 for the fish. The frequency distribution of E. scalaris in their host population can be fitted well with negative binomial distribution. Reproduction of the copepod occurs from Spring through late Autumn. Prevalence and abundance of the parasite exhibit a pattern of seasonal changes with higher levels observed in late Spring and early Summer.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期702-704,共3页
Journal of Southwest China Normal University(Natural Science Edition)
基金
重庆市应用基础资助项目(20005992).
关键词
寄生桡足类
掘凿鳋
种群动态
瓦氏黄颡
parasitic copepod
Ergasilus scalaris
population dynamics
Pelteobagrus vachelli
